Repair and Strengthening of Bridges and other Structure - PowerPoint PPT Presentation

1 / 40
About This Presentation
Title:

Repair and Strengthening of Bridges and other Structure

Description:

Repair and Strengthening of Bridges and other Structures Examples of Repair Methods Masonry structures: Pinning for arch ring separation, concrete fill of spandrel ... – PowerPoint PPT presentation

Number of Views:640
Avg rating:3.0/5.0
Slides: 41
Provided by: usersEncs
Category:

less

Transcript and Presenter's Notes

Title: Repair and Strengthening of Bridges and other Structure


1
Repair and Strengthening of Bridges and other
Structures
2
Examples of Repair Methods
  • Masonry structures Pinning for arch ring
    separation, concrete fill of spandrel walls,
    crack injection, etc.
  • Concrete structures Surface protection,
    protection of steel reinforcement, etc.
  • Steel structures repair of corrosion, cracks,
    distortion, etc.
  • Wrought and cast iron stiffening, stitching,
    etc.

3
Masonry structures
Nagasaki Meganebashi (Japan)
Pont du Gard (France)
Royal Border Rail Bridge (UK)
4
Masonry pinning
5
Tying of longitudinal cracks in arch ring
6
Mass concrete/ reinforced earth fill of spandrel
walls
7
Grouted fill of spandrel walls
8
Crack injection system
9
Epoxy Injection
10
Typical hand-applied concrete repairs
11
Application of fluid concrete to a beam element
12
Plan on column to be repaired
13
Strengthening Methods
  • Steel plate bonding
  • External post-tensioning
  • Composite plate bonding
  • FRP (CFRP) wraps

14
Typical plate bonding application
15
Shear stress distribution in a steel plated RC
beam
16
Peeling failure of a plated RC beam
17
Strengthening of RC slab with steel plates
18
Providing continuity in plates
19
Working platform and support system for plate
bonding
20
Alternative plate bonding solutions
21
Example of strengthening with external
post-tensioning (1)
22
Example of strengthening with external
post-tensioning (2)
23
Example of strengthening with external
post-tensioning (3)
24
Examples post-tensioning of trusses
25
Example of FRP application on a RC beam
26
Comparison of stress-strain characteristics of
steel and carbon
27
Fiber-reinforced Polymer (FRP) Composites
28
Advantages of FRP
29
Role of FRP in Rehabilitation
30
FRP Strengthening Methods
31
FRP Strengthening Methods (1)
32
FRP Strengthening Methods (2)
33
(No Transcript)
34
Mode of failure of beams
35
Example of FRP application on a RC column
36
Application methods of FRP wraps to columns
Wrapping of fabric
Winding of strips
Use of composite cables/strips
Bonding of prefabricated shells
Automated winding
Resin infusion
37
Installation of laminates to the soffit of RC
bridge decks
38
Wrapping of a CFRP fabric to a circular column
39
Applying FRP strip on RC beam
40
CFRP shear reinforcement
Write a Comment
User Comments (0)
About PowerShow.com